diff --git a/src/util/qpolygon-utils.js b/src/util/qpolygon-utils.js
index f8c011f0..7d671a3a 100644
--- a/src/util/qpolygon-utils.js
+++ b/src/util/qpolygon-utils.js
@@ -2591,6 +2591,9 @@ export const drawRoofByAttribute = (roofId, canvas, textMode) => {
               case LINE_TYPE.WALLLINE.JERKINHEAD:
                 offset = oppLine.attributes.width / 2
                 break
+              case LINE_TYPE.WALLLINE.WALL:
+                offset = 0
+                break
               default:
                 break
             }
@@ -2936,6 +2939,9 @@ export const drawRoofByAttribute = (roofId, canvas, textMode) => {
           case LINE_TYPE.WALLLINE.JERKINHEAD:
             offset = oppLine.attributes.width / 2
             break
+          case LINE_TYPE.WALLLINE.WALL:
+            offset = 0
+            break
           default:
             break
         }
@@ -3396,6 +3402,9 @@ export const drawRoofByAttribute = (roofId, canvas, textMode) => {
                 case LINE_TYPE.WALLLINE.JERKINHEAD:
                   offset = oppLine.attributes.width / 2
                   break
+                case LINE_TYPE.WALLLINE.WALL:
+                  offset = 0
+                  break
                 default:
                   break
               }
@@ -3515,7 +3524,7 @@ export const drawRoofByAttribute = (roofId, canvas, textMode) => {
         const oMidX = (oppLine.x1 + oppLine.x2) / 2
         const oMidY = (oppLine.y1 + oppLine.y2) / 2
         const cOffset = currentLine.attributes.offset
-        const oOffset = oppLine.attributes.offset
+        const oOffset = oppLine.attributes.type === LINE_TYPE.WALLLINE.WALL ? 0 : oppLine.attributes.offset
         const ridgeVector = { x: Math.sign(clamp01(cMidX - oMidX)), y: Math.sign(clamp01(cMidY - oMidY)) }
         const ridgePoint = [
           cMidX + ridgeVector.x * cOffset,
@@ -3531,6 +3540,9 @@ export const drawRoofByAttribute = (roofId, canvas, textMode) => {
           case LINE_TYPE.WALLLINE.JERKINHEAD:
             offset = oppLine.attributes.width / 2
             break
+          case LINE_TYPE.WALLLINE.WALL:
+            offset = 0
+            break
           default:
             break
         }